<% value = 'string' unless defined?(value) %>

```json
{
  "id": "string",
  "value": "<%= value || 'string' %>",
  "feed_id": 0,
  "feed_key": "string",
  "created_at": "datetime",
  "location": {},
  "lat": 0.0,
  "lon": 0.0,
  "ele": 0.0,
  "created_epoch": 0,
  "expiration": "datetime"
}
```

